- Formula: PCl5
- Hill system formula: Cl5P1
- CAS registry number: [10026-13-8]
- Formula weight: 208.237
- Class: chloride
- Colour: off-white
- Appearance: crystalline solid
- Melting point: 167°C
- Boiling point: 160°C
- Density: 2100 kg m-3
The following are some synonyms of phosphorus pentachloride:
- phosphorus pentachloride
- phosphorus(V) chloride
- phosphoric chloride
- phosphorus chloride
The oxidation number of phosphorus in phosphorus pentachloride is 5.
PCl3 + Cl2 → PCl5
Careful chlorination of phosphorus(III) trichloride results in phosphorus(V) pentachloride. The tyield is about 85%. Phosphorus(V) pentachloride is a white solid whose density is about 1600 kg m-3 and whose melting point is about 148°C under pressure. It sublimes at about 160°C.
Solid state structure
- Geometry of phosphorus: mixed 4-, 6-coordinate: tetrahedral and octahedral
- Prototypical structure:
The table shows element percentages for PCl5 (phosphorus pentachloride).
Isotope pattern for PCl5
The chart below shows the calculated isotope pattern for the formula PCl5 with the most intense ion set to 100%.
The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.
- R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
- N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
- F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
- A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
- R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
- A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
- A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
- J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
- D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
- J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
- J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.